Wpf 创建自定义ProgressBar时出现绑定问题

I get错误：无法在“Point”类型的“X”属性上设置“Binding”。只能对DependencyObject的DependencyProperty设置“绑定”

有没有干净的解决办法？

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由于Point.X不是依赖项属性，因此无法将其绑定到某个对象。不过，您可以绑定EndPointProperty，并使用转换器为您创建点。例如，它可以将Y值作为参数

Xaml

注意：可能与您的问题无关，但如果您也需要绑定Y，则可以使用如下的多重绑定

public class PointXConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        double progressBarValue = (double)value;
        double yValue = System.Convert.ToDouble(parameter);
        return new Point(progressBarValue, yValue);
    }
    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

<LinearGradientBrush.EndPoint>
    <Binding RelativeSource="{RelativeSource AncestorType={x:Type ProgressBar}}"
             Path="Value"
             Converter="{StaticResource PointXConverter}"
             ConverterParameter="0"/>
</LinearGradientBrush.EndPoint>

public class PointXConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        double progressBarValue = (double)value;
        double yValue = System.Convert.ToDouble(parameter);
        return new Point(progressBarValue, yValue);
    }
    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

<LinearGradientBrush.EndPoint>
    <MultiBinding Converter="{StaticResource PointConverter}">
        <Binding RelativeSource="{RelativeSource AncestorType={x:Type ProgressBar}}"
                 Path="Value"/>
        <Binding RelativeSource="{RelativeSource AncestorType={x:Type ProgressBar}}"
                 Path="Value"/>
    </MultiBinding>                                        
</LinearGradientBrush.EndPoint>

public class PointConverter : IMultiValueConverter
{
    public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        double xValue = (double)values[0];
        double yValue = (double)values[1];
        return new Point(xValue, yValue);
    }
    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}